Assuming Graves vs. Graves, both with standard 21/X/X masteries, Flat AD marks and quints:
Graves A has Flat AD Seals and Glyphs as well, Graves B has flat armor seals and choice glyphs (non-AD, non-armor so it doesn't matter here).
For simplicity, Graves' passive will be completely ignored.
Graves A has 54.1 + 25.36 AD, 3 and 8% ArPen, and 18.2 Armor at level 1
Graves B has 54.1 + 18.97 AD, 3 and 8% ArPen, and 30.89 Armor at level 1
Graves A does 63.35 damage per auto to B
Graves B does 64.24 damage per auto to A
Buckshot - Rank 1, all 3 projectiles hit:
Graves A does 108.83 damage to B
Graves B does 112.35 damage to A
Congrats, your flat AD seals and glyphs are strictly inferior to half the number of runes used at level 1, and it only gets worse as level increases and raw physical damage totals go up.
Edit: I already passed 1300 in 5v5's. Can you wish me luck for breaking 1600?
Edit2: And with no way to tell if you even played those games, much less if you're getting carried by your teammates or not.